Paul Anater A lot of times, vanities like that are pieces of furniture that get converted for use as vanities. It's not tough to do and most lowboy dressers can be made into vanities.

vivcheung13 Here's a version of a mirrored vanity. Sorry, I can't find the same one as shown in the photo:
http://www.berkshirefurniture.com/productdetails1.php?pid=4460&categoryid=1,37&subcategoryid=218&sub2categoryid=373

Emily Hurley Thanks to another Houzzer, here it is!

Amy Newman Lauffer, CID, LEED AP This vanity was an off brand....I don't remember the vendor but so many vendors make a similar now a days.....your bound to find one if you just google "mirrored bathroom vanity"
I paid about $680 for this and it came with a marble top and undermount bowl that I discarded and had a custom top made for this vessel that was actually 3" wider on each side of the vanity to make it look a bit bigger since the vanity only came in one size. Hope this helps :-)
AMY